Effect of different N, P, K, Ca, and Mg rates on the number and weight dynamics in potato tubers

agricultural chemicals agronomic characters alkaline earth metals anatomia anatomie anatomy biometria biometrie biometry calcium fertilizers chemicophysical properties crops cultivos dimension dimensions economic plants elements engrais engrais calcique engrais potassique fertilizantes fosfatados fertilizantes nitrogenados fertilizers fosfatos hortalizas (plantas) inorganic compounds magnesio magnesium measurement mesure metal metales metales alcalinoterreos metals methode methods nitrogen fertilizers papa peso phosphate phosphate fertilizers phosphates plant anatomy plantas plantas feculentas plante plante de culture plante racine plants poids pomme de terre potash fertilizers potatoes productividad productivity produit agrochimique profitability rendement rendimiento rentabilidad root crops root vegetables sales salts sel starch crops stems storage organs tallo tige tubercule tubers vegetable crops weight yields